This demo shows how windows containing
like iframe, Flash game, or QuickTime video, can be dealt with.
By setting embeddedContent option to true, whenever window is not
on top, an overlay is put over window, allowing to bring it back
to top when it's clicked. Normally, click event would not be propagated
from embedded content to DOM.
Window containing basic demo has a custom styles set to overlay,
while window containing video has the default styles.